Grease-cup.



R. HIGKISH.

GREASEGUP.

APPLICATION FILED F313, 1912.

FEJ

WITNESSES 9w wm 'ATTORNEV rear rnro nossrrr Blemish, or rooxanon, iinw roan.

GREASE-CUP.

Specification 02 Letters Patent. Application sietsetruar a, 1912. Serial R0. 675.2114.

provide a grease cup, which discharges automatically the lubricant, with means whereby the automatic operation of the same is arrestediand the lubricant is forced to'the parts to be lubricated by manually construction of parts hereinafter fully described, point-ed out in the appended claim' and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention. 7 I t One of themany possible embodiments of the invention is illustrated in the acconipa-l nying drawings, in which 2- v Figure 1 is a vertical central section of a grease cup constructed in accordance with the present invention, and Fig. 2 is a plan view of the same.

In the drawings, the numeral 3 indicates the base of the cup which is provided with a cylindrical flange portion 4, the inner face of which is screw threaded, as shown at 5,, which-threads mesh with the screw threads 6 of the grease cup body 7. This body com-' prises a tubular member, which is open at its lower end and closed at its upper end by a. cover 8, which latter may be made integral with the body portion of the cup, or'

may be fastened thereto in any suitable manner. The base portion 3 of the cup is Patented Nov. 5, 1912.

provided with a centrally arranged stem 9,

throughout which leads a passage 10 to the interior of the grease cup. The passage 10 is controlled by a valve plug .10. T he'stem 9 is screw threaded externally, as shown at v for attachingthe'grease cup to the bearmg or other parts to be lubricated. A centrally arranged tubular extension 12 upon the cover 8 com nunicates through a hole 13 1n said cover with the interior of the grease cup. Through this opening 13 projects the,

plunger rod 14;, which carries on its lower end a piston 15, snugly fitting the inner surface of the body portion 7 of the grease cup and resting upon the surface of the grease. A helical spring 16 bears against the inner surface of the cover portion 8 and the piston 15, keeping thereby the piston down against the grease at all times to insure a constant discharge of the same from the cup.

Upon. the side of the base portion of the cup is formed a cylindrical extension 17, in which is formed a passage 18, leading to the interior of the cup. At the outer end of this extension is arranged a downwardly extending tubular valve casing ,19, which is provided at its lower end with a bottom 20, while its upper end is open for a purpose to be described. At this upper end the valve casing is recessed, as shown at 21, which recess extends down to the lowermost level of the passage 18. A cylindrical valve.22 is seated in the valve casing, and kept therein by means of a stop, 23, attached to the upper end of said valve casing. A spring 24, hearing against the bottom 20 of the valve casing and the valve, forces said valve against the stop 23, closing thereby the passage 18 in the extension 17 of the base.

The plunger rod 14: is provided almost throughout its length with ratchet screw threads 25, which are adapted to be engaged by a detent 26. The detent is slidably'arranged upon the cover portion 8 of the cup, projects through an opening 12 in the tubular portion 12, and is kept in engagement with said ratchet screw threads iby means of a spring 27, arranged in any \suitable manner upon the cover 8. The deltent 26 is provided at its rear end with a lug 28, cooperating with the bellcrank lever \29, which is fulcrumed at 30 to a brace 31,

the latter being supported by the cover porthe end of the stem of the grease pump until said stem can be inserted into the passage 18.

The passage leading from the interior of the cup to the object to be lubricated is then closed by the plug 10, after which the pump is operated. As the lubricating material is now forced into the grease cup, the piston w1ll be caused to move upward against the action of the spring 16; the screw threads t of the stem 14 will act as ratchet teeth, and

be engaged, one after the other, with the detent 26, which holds the piston in any intermediate position, and prevents the spring 16 from forcing the piston 15 toward the base. At the end of the upward movement of the piston 15, the enlarged end 34: of the plunger rod forces the detent outward, whereby the spring 32 which tends to raise the substantially horizontal arm of the bellcrank lever 29, engages the latter with the inner face of the lug 28, keeping thereby the detent out .of the path of the ratchet screw threads. In pulling out the stem of the grease pump from the passage 18 in the extension 17, the valve 22 will be automatically brought in its closing position. As soon as the passage 10 is opened, the lubrication proceeds, and the piston 15 starts to descend toward the base of the cup. WVhen the piston reaches its lowermost position,

the knob 33 will force the substantially horizontal arm of the bellcrank 29 downward,

and thus disengage the same from the lug 28, whereby the spring 27 is left free to act, forcing thus. the detent into engagement with the ratchet screw threads, whereby the device is ready for refilling.

If it is intended to stop the automatic,

' forced feeding of the lubricating material at zany intermedlate point of the movementof the piston, it is only necessary to depress the substantially horizontal arm of the bellengage one of the ratchetscrew threads of the plunger rod 14 and arrest the movement of the piston. Since thereby the spring 16 ceases to exert pressure upon the surface .of the grease, the forced feeding of the same plunger rod attached to said piston passing through the opening in the cover of said tubular body and being provided with ratchet screw threads, a spring tending to force said piston toward said base, a spring pressed detent adapted to engage said ratchet screw threads for holding said piston against the action of said spring in intermediate positions between the uppermost and lowermost "positions in said jtubular body, and a knob attached to said plunger and for automatically disengaging said detent from .said screw threads when said piston reachesits lowermost position.

Signed at New York, in the county of day of February, A. D. 1911.

ROBERT l-IIOKISH.

Witnesses: I

SIGMUND Hrnzoe, 7 S. BIRNBAUM.

crank lever 29, whereby the detent 26 will I to the part to be lubricated will, of course,

cover, a piston operating in said body, a i

rod'for facilitating the rotation of the latter 7 New York and State of New York, this 25th 

